Can i use 20w50 engine oil for apache rtr160 bs4? my mechanic suggested to use it
I believe this is the Owner's Manual for this vehicle:
On page 32 is calls for "SAE 10W-30 API-SL JASO MA2" specification oil. I did not find 20W-50 listed as an acceptable alternative.
So NO, you should not use 20W-50 in this bike.